Home / 21,345.39-29,452.07-12,388.11

Finding the Fourth Proportional to 21,345.39, 29,452.07 and 12,388.11

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Solution

The fourth proportional to 21,345.39, 29,452.07 and 12,388.11 is: 17,092.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,345.39 : 29,452.07 = 12,388.11 : x
  2. Step 2: Convert to fraction form
    21,345.39/29,452.07 = 12,388.11/x
  3. Step 3: Cross multiply
    21,345.39x = 29,452.07 × 12,388.11
  4. Step 4: Simplify right side
    21,345.39x = 364,855,403.41
  5. Step 5: Solve for x
    x = 364,855,403.41/21,345.39
  6. Step 6: Final answer
    x = 17,092.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.